Rack and Pinion Task
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Re: Rack and Pinion Task
Well, that simple "Yes" can open a huge can of worms and ruin someone's day.
If you use the belt and associated gear to move something linearly, fine. Fabulously inexpensive, too. Compared to $6 for 20cm of Kelvin track.
BUT
Use the belt in its as-built purpose (non-slip V-belt) and just spin a gear, and you no longer have a rack & pinion.
As an event sup, I'll be looking for one of the following three:
A rack moving linearly, turning a stationary pinion gear
A stationary turning gear moving a rack linearly.
A stationary rack upon which a gear moves linearly down the track
PLUS:
The operation of one of the three above CAUSING the next action/step/whatever.
REMEMBER that it's the SETUP and USE of the component(s) that determines what simple machine is being used.
If you use the belt and associated gear to move something linearly, fine. Fabulously inexpensive, too. Compared to $6 for 20cm of Kelvin track.
BUT
Use the belt in its as-built purpose (non-slip V-belt) and just spin a gear, and you no longer have a rack & pinion.
As an event sup, I'll be looking for one of the following three:
A rack moving linearly, turning a stationary pinion gear
A stationary turning gear moving a rack linearly.
A stationary rack upon which a gear moves linearly down the track
PLUS:
The operation of one of the three above CAUSING the next action/step/whatever.
REMEMBER that it's the SETUP and USE of the component(s) that determines what simple machine is being used.
Last edited by Fester on March 4th, 2012, 3:51 pm, edited 1 time in total.
- knittingfrenzy18
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Re: Rack and Pinion Task
Yes, please be careful. I didn't properly know the definition of rack and pinion, and I used a chain drive and didn't get points for it at the competition.
Pilgrimage Homeschool Division B, Maryland
Visited 2012 and 2014 National Tournaments, 5th place Sounds of Music 2014
http://knittingfrenzy18.wordpress.com
Visited 2012 and 2014 National Tournaments, 5th place Sounds of Music 2014
http://knittingfrenzy18.wordpress.com
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